Afsiroon Naqas scrapes dirt off the ground of the Rawalpindi, Pakistan, market. He's not trying to clean the place up, but rather to find little bits of gold that through a little bit of alchemy he can turn into $8 of gold — which he uses to feed his family.

Liberian Pastor Peter Flomo has seen the effect of Ebola in his own congregation. Now he's on a mission to stop its spread with handwashing. He thinks a $15 plastic bucket filled with water and bleach may help.

The Sahel region of West Africa is being hit hard by climate change. But from the country of Burkina Faso, Mark Hertsgaard spotlights a small green miracle that's helping farmers fight the warming trend. The secret, he says, is trees. On PRI's The World.